"Tigers are endangered and critical to some of the world's most important ecosystems," the star said in a statement. "Key conservation efforts can save the tiger species from extinction, protect some of the planet's last wild habitats and help sustain the local communities surrounding them. By protecting this iconic species, we can save so much more."

The campaign, launching in the Chinese Year of the Tiger, seeks to raise million to help double the tiger population by 2022 – the next Year of the Tiger.

It's the latest green project for Leo, whose past environmental outreach has included the documentary "The 11th Hour" and his award-winning Leonardo DiCaprio Foundation.